public static void main(String[] args) throws Exception {
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
final Boolean isNotificationSupported =
AccessController.doPrivileged(
new PrivilegedAction<Boolean>() {
public Boolean run() {
try {
Class cl = Class.forName("sun.management.VMManagementImpl");
Field f = cl.getDeclaredField("gcNotificationSupport");
f.setAccessible(true);
return f.getBoolean(null);
} catch (ClassNotFoundException e) {
return false;
} catch (NoSuchFieldException e) {
return false;
} catch (IllegalAccessException e) {
return false;
}
}
});
if (!isNotificationSupported) {
System.out.println("GC Notification not supported by the JVM, test skipped");
return;
}
final ObjectName gcMXBeanPattern = new ObjectName("java.lang:type=GarbageCollector,*");
Set<ObjectName> names = mbs.queryNames(gcMXBeanPattern, null);
if (names.isEmpty()) throw new Exception("Test incorrect: no GC MXBeans");
number = names.size();
for (ObjectName n : names) {
if (mbs.isInstanceOf(n, "javax.management.NotificationEmitter")) {
listenerInvoked.put(n.getCanonicalName(), null);
GcListener listener = new GcListener();
mbs.addNotificationListener(n, listener, null, null);
}
}
// Invocation of System.gc() to trigger major GC
System.gc();
// Allocation of many short living and small objects to trigger minor GC
Object data[] = new Object[32];
for (int i = 0; i < 100000000; i++) {
data[i % 32] = new int[8];
}
int wakeup = 0;
synchronized (synchronizer) {
while (count != number) {
synchronizer.wait(10000);
wakeup++;
if (wakeup > 10) break;
}
}
for (GarbageCollectionNotificationInfo notif : listenerInvoked.values()) {
checkGarbageCollectionNotificationInfoContent(notif);
}
System.out.println("Test passed");
}
/**
* This method inserts a default value for the standard java types, else it inserts the text name
* of the expected class type. It acts to give a clue as to the input type.
*/
public static String getDefaultValue(String type) {
if (numericalTypes.contains(type) || extraNumericalTypes.contains(type)) {
return "0";
}
if (booleanTypes.contains(type)) {
return "true";
}
type = getReadableClassName(type);
int i = type.lastIndexOf('.');
if (i > 0) {
return type.substring(i + 1, type.length());
} else {
return type;
}
}
static {
// compute primitives/primitiveMap/primitiveToWrapper
for (Class<?> c : primitiveWrappers) {
try {
Field f = c.getField("TYPE");
Class<?> p = (Class<?>) f.get(null);
primitives.add(p);
primitiveMap.put(p.getName(), p);
primitiveToWrapper.put(p.getName(), c);
} catch (Exception e) {
throw new AssertionError(e);
}
}
// compute editableTypes
for (Class<?> c : primitives) {
editableTypes.add(c.getName());
}
for (Class<?> c : primitiveWrappers) {
editableTypes.add(c.getName());
}
for (Class<?> c : extraEditableClasses) {
editableTypes.add(c.getName());
}
// compute numericalTypes
for (Class<?> c : primitives) {
String name = c.getName();
if (!name.equals(Boolean.TYPE.getName())) {
numericalTypes.add(name);
}
}
for (Class<?> c : primitiveWrappers) {
String name = c.getName();
if (!name.equals(Boolean.class.getName())) {
numericalTypes.add(name);
}
}
}
@Override
public void keyPressed(KeyEvent e) {
// Accept "copy" key strokes
KeyStroke ks = KeyStroke.getKeyStroke(e.getKeyCode(), e.getModifiers());
JComponent comp = (JComponent) e.getSource();
for (int i = 0; i < 3; i++) {
InputMap im = comp.getInputMap(i);
Object key = im.get(ks);
if (defaultEditorKitCopyActionName.equals(key)
|| transferHandlerCopyActionName.equals(key)) {
return;
}
}
// Accept JTable navigation key strokes
if (!tableNavigationKeys.contains(e.getKeyCode())) {
e.consume();
}
}
/** This method tells whether the type is editable (means can be created with a String or not) */
public static boolean isEditableType(String type) {
return editableTypes.contains(type);
}